Design and experiment on concentration of phosphorus in factory converter slags

The phosphorus-concentrating phase in the converter slags was designed and simulated by synthetic converter slag.The distribution of phosphorus in factory converter slags was also analyzed by scanning electron microscope（SEM） and X-ray diffraction（XRD）.Then factory converter slags were modified by addition of SiO;and heated to 1540℃and then cooled to room temperature.The results showed that the phosphorus in the factory converter slags was mostly distributed in two phases:dicalcium silicate （C;S） and tricalcium silicate（C;S） by formation of solid solution,and with a little in matrix.Whereas,in the synthetic slags with the basicity close to 3,phosphorus was almost concentrated in phase of C;S（Pconcentrating phase） in which the contents of P;O;reach to 7.74%.This lays a good foundation for grinding and separation of P- concentrating phase.